【摘要】：國家“十三五”規(guī)劃提出,要加快城市群建設,優(yōu)化城鎮(zhèn)布局和形態(tài),增強中心城市輻射作用。蘭西地區(qū)是我國西北區(qū)域城鎮(zhèn)密集區(qū)之一,基于優(yōu)越的區(qū)位條件和資源優(yōu)勢,城市化水平不斷提高,區(qū)域內(nèi)規(guī)模、形態(tài)各異的城鎮(zhèn)發(fā)展速度較快。城市規(guī)模分布狀況及空間形態(tài)演化模式合理與否,對于區(qū)域性內(nèi)城市協(xié)同發(fā)展具有重要意義。蘭西地區(qū)由于特殊的自然地理環(huán)境與多民族聚居形態(tài),城市規(guī)模分布及空間形態(tài)不同于我國中東部地區(qū)城市。本文以蘭西地區(qū)為研究對象,首先,通過區(qū)域性城市發(fā)展歷程及現(xiàn)狀空間分布格局梳理,對蘭西地區(qū)城市間發(fā)展脈絡全局性認識。然后運用類型學的方法對城市空間形態(tài)分析,從中得出河谷型帶狀城市空間形態(tài)在蘭西地區(qū)最為典型,并以蘭州、西寧兩大核心城市為例對河谷型城市空間形態(tài)特征分析。其次,探討蘭西地區(qū)自然環(huán)境條件與多民族聚居形態(tài)的交互作用。地形海拔高度與河流系統(tǒng)對人類聚居、城市分布格局、空間形態(tài)演化均具至關重要;蘭西地區(qū)少數(shù)民族基本沿河湟流域呈現(xiàn)“大分散、小聚居”帶狀分布,城市空間形態(tài)受宗教文化影響突出,表現(xiàn)為“圍寺而居”、“圍寺而商”的特殊形式。通過分析得出自然地理環(huán)境對蘭西地區(qū)城市人口規(guī)模分布和空間形態(tài)演化具有明顯的導向作用。定量分析部分,運用首位度指數(shù)、zipf定律、分形維數(shù)對蘭西地區(qū)城市人口規(guī)模分布現(xiàn)狀特征及演化過程分析。城市人口規(guī)�，F(xiàn)狀規(guī)模等級結構連續(xù),大中規(guī)模城市分布相對分散,小城市數(shù)量較多,蘭州市首位特征明顯,但是對區(qū)域城鎮(zhèn)體系發(fā)展的帶動作用有所欠缺。從2004-2014年蘭西地區(qū)城市人口規(guī)模分布演變過程來看,城市間人口規(guī)模序列一直存在差異,但是逐漸優(yōu)化,其中首位城市蘭州市人口規(guī)模漸漸縮小差距,中小城市地位不斷增強。通過分形維數(shù)中的關聯(lián)維數(shù)對蘭西地區(qū)城市分布格局量化分析,結果與定性分析中蘭西地區(qū)城市沿河湟谷地分布相吻合。接下來運用城市擴展強度指數(shù)、城市建設用地擴展速度、分維數(shù)、緊湊度指數(shù)及城市擴展彈性系數(shù)等對典型城市空間形態(tài)探討研究,發(fā)現(xiàn)西寧市近30年城市空間擴展特征符合河谷型城市空間形態(tài)演化特征,現(xiàn)階段城市空間擴展出現(xiàn)浪費現(xiàn)象。最后,宏觀層面對蘭西地區(qū)城市規(guī)模合理分布提出建議,微觀層面對典型河谷型城市空間形態(tài)演化提出優(yōu)化策略。
[Abstract]:According to the 13th Five-Year Plan, it is necessary to speed up the construction of urban agglomeration, optimize the layout and form of cities and towns, and enhance the radiation function of central cities. Lanxi region is one of the cities and towns concentrated in northwest China. Based on the superior location conditions and resource advantages, the urbanization level is constantly improving, and the cities and towns of different shapes and shapes develop rapidly in the region. It is of great significance for the coordinated development of cities in the region whether the distribution of urban scale and the evolution mode of spatial form are reasonable or not. Because of the special natural geographical environment and multi-national settlement, the urban scale distribution and spatial form in Lanxi are different from those in the central and eastern part of China. This paper takes Lanxi area as the research object, firstly, combs through the regional city development history and the present situation spatial distribution pattern, to the Lanxi area inter-city development vein overall understanding. Then the urban spatial form is analyzed by typology, from which it is concluded that the valley zonal urban spatial form is the most typical in the Lanxi area, and taking Lanzhou and Xining as examples, the spatial form characteristics of the valley city are analyzed. Secondly, the interaction between natural environment conditions and multi-national settlement in Lanxi area is discussed. Topographic altitude and river system are very important to human settlement, urban distribution pattern and spatial evolution. The minority nationality in Lanxi area basically presents the "big dispersion, small settlement" belt distribution along the river valley, and the urban spatial form is influenced by religious culture, which shows the special form of "living in the surrounding temple" and "living in the surrounding temple and Shang". It is concluded that the natural geographical environment plays an important role in the distribution of urban population and the evolution of spatial form in Lanxi area. In the part of quantitative analysis, first degree index, zipf law and fractal dimension are used to analyze the present situation and evolution process of urban population distribution in Lanxi area. The present situation of urban population scale and scale structure is continuous, the distribution of large and medium-sized cities is relatively dispersed, the number of small cities is more, the first characteristic of Lanzhou is obvious, but the driving effect on the development of regional urban system is lacking. According to the evolution process of urban population size distribution in Lanxi from 2004 to 2014, the sequence of urban population size has always been different, but gradually optimized, among which the population size of Lanzhou City, the first city, has gradually narrowed the gap. The status of small and medium-sized cities is constantly increasing. The correlation dimension of fractal dimension is used to analyze the urban distribution pattern in Lanxi area. The results are consistent with the qualitative analysis of urban distribution along Hehuang valley in Lanxi area. Then using the city expansion intensity index, the urban construction land expansion speed, the fractal dimension, the compactness index and the city expansion elasticity coefficient to study the typical urban spatial form. It is found that the characteristics of urban spatial expansion in Xining in the past 30 years accord with the evolution characteristics of urban spatial form of river valley type, and the phenomenon of urban spatial expansion is wasteful at the present stage. Finally, suggestions are made on the rational distribution of urban scale in Lanxi at the macro level, and optimization strategies are put forward on the microscopic level on the spatial evolution of typical river valley cities.
【學位授予單位】：河南工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU984.113

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